It's been almost a full year since The Binding of Isaac: Afterbirth+ was announced for release sometime in 2016. And as of today it looks like that date is going to hold: A new post at bindingofisaac.com reveals more about the expansion, which will include new items, enemies, bosses, challenges achievements, and "in-depth mod tools," and says it will be out within the next 60 days—hopefully before the end of the year.
"We are currently in testing and finalizing achievements, but are running into some minor release overlap issues with the holiday rush," Binding of Isaac creator Edmund McMillen wrote. "What i can say is AB+ will release in the next 60 days on steam the goal has always been to release at the very end of the year and [we] are still shooting for it but there are some things that are a bit out of our control."
Following the release of the expansion, McMillen said he'll be keeping an eye on the mod scene on Reddit, and will every so often select a favorite for official inclusion in the game. "This is a feature im really looking foward to, i feel like ive personally scraped the barrel when it comes to item design and feel quite depleted, but im positive that there are a ton of cool ideas out there that are so left field that they MUST be added to the main game," he wrote. "So once this thing releases, its time to prove your worth!"
He also touched on the status of the other projects he has in the works, The Legend of Bumbo and 0uroboros. Legend of Bumbo "has been a hard nut to crack" but is now "an officially fun and very interesting game," which means it will be getting its own dev blog within the next few weeks. As for 0uroboros, "sadly there isn’t much new to show gameplay wise but im sure we will have some fun news to share in a month or so."